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How is a nasogastric lavage used to diagnose blood in stool?

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A nasogastric lavage is a test that may tell your doctor if your bleeding is in the upper or lower digestive tract. The procedure involves removing the contents of the stomach through a tube inserted into the stomach through the nose. If the stomach does not contain evidence of blood, the bleeding may have stopped or is more likely in the lower digestive tract.

From: Blood in Stool WebMD Medical Reference

SOURCES:

MedlinePlus: "Bloody or tarry stools."

Nebraska Colon Cancer Screening Program: "Rectal Bleeding: What You Should Know."

MedlinePlus: "Gastrointestinal fistula."

NYU Langone Medical Center: "Angiodysplasia of the Colon."

National Digestive Diseases Information Clearinghouse: "Bleeding in the Digestive Tract."

The Ohio State University Medical Center: "Peptic Ulcers."

Reviewed by William Blahd on July 11, 2017

SOURCES:

MedlinePlus: "Bloody or tarry stools."

Nebraska Colon Cancer Screening Program: "Rectal Bleeding: What You Should Know."

MedlinePlus: "Gastrointestinal fistula."

NYU Langone Medical Center: "Angiodysplasia of the Colon."

National Digestive Diseases Information Clearinghouse: "Bleeding in the Digestive Tract."

The Ohio State University Medical Center: "Peptic Ulcers."

Reviewed by William Blahd on July 11, 2017

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How is an esophagogastroduodenoscopy (EGD) used to diagnose blood in stool?

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